Tacking mechanism



E. E. ROWE.

TACKING MECHANISM. APPLICATION FILED APR. 30. 1918.

1,399,799, I v Patented Dec. 13, 1921.

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: N TE STATES Parent-on EDGAR E. nown, or CHICAGO, rumors. ASSIGNORTO uv zrnn s ren ,M o conrona'rron, or ra'rnnson, NEW" JERSEY, A oonrona'ron or n-nw EnsnY.

'T'ACKZENG MECHANISM.

Specif cation of Letters Patent.

Application filed April so, 1918. EaeiialN o.q231,8,16.

To (ZZZ whom it may concern: 7

Be it known that I, EDGAR E. Rown, a citizen of the United States,residing at Chicago, in the county of Cook and State .of Illinois, haveinvented certain Improvements in Tacking Mechanisms, .of which thefollowing description, in connection with .the accompanying drawings, isa specification, like reference characters on the drawings indic atinglike parts in the several figures.

This invention relates to tackin {mechanism, and is herein shown, forpurposes of illustration, as embodied in mechanism particularly adaptedfor use in the manufacture ofboots and shoes for securing portions ofthe shoe in proper relation. More particularly, the invention is hereinillustrated its application .to a machine for pulling uppers over lasts,the illustrative machine having features of construction which are ofparticular utility in operation upon turn shoes. It will be understood,however, that the invention in its broader aspects, although involvingimportant advantages in use .on turn shoe work as will be hereinafterexplained, is not thus limited in utility nor restricted in itsapplicability-to machines of the particular class exemplified by theconstruction shown.

Pulling-over machines of. a well known type incommon use comprise,intheir organization, grippers which areoperated to pull the upper overthe last, and tacking mechanisms which are moved inward over the bottomof the shoe and are operated to drive a plurality of tacks at separatedpoints for securing the upper in its pulled-over position. On McKay shoework these tacks are (fully driven, while on welt work and turn workthetacks are only partially driven, a substantial portion of the tackbeing left projecting from the shoe to facilitate subsequent removal..On welt work it is the practice to drive the tacks through the upperand the innersole-and a substantial distance into the withlthe welt shoeinnersole, provides suf- Patented Dec. .13, 1921. I

.ficient substance for anchoring the tacks securely enough -to;hold theupper,-and therefore affords opportunity for driving the tacks onlypartially through thesole in .such manner as to avoid marks on thefinished side of the sole. Attempts to drive the upper fasten ngtacks inthis .mannerhave. however, heretofore met with serious difficultieswhich it is one of the important objects of this invention to avoid. vTacking mechanism of a well known ltvpe n use ,on; pull1ng-,over andother machines comprises a tack holder having relatively I I separableportions provided in theiradjacent faces with cooperating recesses whichform a tack pocket for receiving and holding a tack, the two portionsbeing normally held together under spring pressure, and a driver whichengages the tack in the pocket and forces it into the work.Thismechanism is moved transversely of the edge of the shoe bottom intotack drivin position,a nd afterthe tack is driven is moved reverselyaway from the tack. In order to insure effective control of the ,tack inits passage from the tack holder to the work to cause it to be driven inthe desired direction. it is necespiercing thatsurface ofthe sole whichisnext' to ,the last, it is practically unavoidable, if

the-tack is .;to be guided properly, that a portion of the tack shall beleft projecting VVllih.

in the tack holderat the end of the driving movement of the tack driver;Under such conditions it .has been found that when the tacking mechanismbacks away from the tack the tack holden; by engagement with the headofthe tack'partiallyconfined within the tack ,pooket, tends to vpull thetack laterally and in view .of, the relatively yieldablecharacterofthesole materialmay-bend it out of its place .or [evenwithdraw it entirely from the shoe. g

Th1s inventlon provldes an mprovement in tacking .mechanlsm wherebv it1s rendered feasible to drive a tack only to the extent.

desired without involving'any substantial danger of displaCQlllQllt ofthe tack in the relative separating movement of parts of the mechanismand the work, however yieldable may be the character of the materialinto which the tack is driven. For the purposes in View the inventionprovides a construction in the operation or" which an outlet passagesuch as to prevent displacement of the tack is afforded for that portionof the tack which remains within the tack holder at the end of the tackdriving operation. It is an important characteristic of the constructionwherein the invention is herein shown as embodied that the portions ofthe tack holder are separated sufiiciently in the driving operationtorelieve that portion of the tack which remains within the holdersubstantially from the pressure of the holder, and to afiord a freeoutlet passage for the head of the tack, and are held in such conditionuntil the holder has been withdrawn from the tack.

The novel features-oi the invention, including certain details ofconstruction and combinations of parts, will now be described withreference to the accompanying drawings and pointed out in the claims.

In the drawings,

Figure 1 is a view in front elevation, with parts shown in section, of aportion of a pulling-over machine having tacking mechanism in which theinvention is embodied;

Fig. 2 isa view in perspective of a portion of the mechanism shown inFig. 1, illustrating the relation of the parts to the shoe when thetacking mechanismis in tack driving position;

Fig. 3 is a view similar to Fig. 2 illustrating the relation of the difierent parts to one another and to the work after the tack has beendriven and the tacking mechanism has been partially withdrawn;

Fig. iis a view sh wing the tack holder in vertical section andillustrating the position of the tack prior to the tack drivingoperation,

Fig.5 is a View similar to Fig. 4 illustrating the relative positions ofthe parts when the tack driver is at the end of its driving movement,and

Fig 6 is a perspective view of one of the parts of the tack holder,illustratingthe character of the tack receiving recess.

The invention is herein shown in its application to a pulling-overmachine of a well-known type particularly adapted for operation uponturn shoes and comprising,

in addition to the upper pulling means,

mechanism for working the forepart of the shoe upper into lastedposition, the construc tion of the illustrative type of machine beingmore fully shown and described in a United States Letters Patent No.1,280,613, granted on Oct. 1, 1918. upon an application of@rrellA-ishton. The drawings show only a portion of the pulling-over,lasting and. tacking means arranged to operate at one side of theforepart of the shoe, but it will be understood that the machine isprovided with means tor pulling the upper at the toe and at oppositesides of the torepart, means for wiping the upper into lasted positionabout the toe and along the opposite sides of the toe portion, and meansfor driving a plurality of tacks at each side of the shoe and alsoaround the toe end of the shoe for holding the margin of the upper inplace.

In Fig. 1 is shown a portion of the'sole rest 2 of the machine whichengages the sole (4 of the shoe on the last b to hold the shoe againstthe strain of the upper pulling,

means and determine the position of the plane of the sole relatively tothe tacking means, one of the several grippers l which are operatedtopull the upper 0 over the last, a portion of the lasting wipers 6 whichare operated to wipe the upper over the sole around the toe, and one ofthe supporting and clamping devices 8 which engage the shoe at theopposite sides of the forepart to hold it and support it during thetacking operation and to assist in positioning it relatively to thetacking means. In Fig. 1 is shown also one of the side tacker arms 10 ofthe machine which is mounted on a support 12 for swinging movementtoward and from the shoe and carries a plurality of tack holders,comprising opposed fingers 14;, and tack drivers 16,'only one suchholder and driver, however, being shown in the drawings. It will beunderstood that the machine is provided with another tacker arm 10withits tacking mechanism at the opposite side of the shoe and withsimilar tacking mechanism for the toe end of theshoe. Since thesedifferent mechanisms, and the different tack holders and drivers of eachmechanism, involve no essential differences one from another as far asthe embodiment of the present inventionis concerned, it will be sufiicient for an understanding of the in-- vention to refer in detail onlyto one of the tack holders and its associated driver.

Connected to the driver 16 is a driver bar 18 which is mountedionlengthwise movement in the tacker arm 10 and receives its operativemovement from an oscillatory driver arm 20 under the impulse of a sprin22. The driver bar 18 is normally upheld against the pressure of thespring operated arm 20 by the usual mechanism characteristic of machinesof the illustrative type, and is released at the proper time in thecycle of operations of the machine to render the spring effective toimpart operative movement to the bar to cause the driver 16 to drive thetack, the limit of driving movement of the bar and the driver beingdeterminedby the engagement of an adjustable washer on the driver barwith a portion of the support 12. The position of the washerQl: and thelimit of operative moyement of the bar is determined by the adjustmentof nuts26 on the end of thebar. The

movements of the .tacker arm .10 and .the

mechanism carried thereby in directions to ward and from the shoe areeffected by nieans of a rack bar 28 and a gear segment- .30, shownfragmentarily in F 1g. 1, the conbeing more fully shown and described inUnited States Letters Patent No. 1,082,487,

granted on December 30, 1913 upon an application of Arthur Bates.

The tack holder, as more fully described in the prior patent of OrrellAshton hereinbefore referred to, comprises the two complementary fingers14 embracing and seated in grooves in a supporting plate 32 on thetacker arm 10 and normally pressed together and held in place by meansof a spring 3 1. The two fingers at their front ends are provided withcomplementary grooves or recesses 36 which provide a pocket for thereception of the tack ,cl .deposited therein automatically at apredetermined time in the cycle of operations of the machine. Subsequentto the upper pulling operation the tacker arm 10 is swung inward by itsoperating mechanism, in ;u nison with the overdraw movement of the sidegripper 4, into position for driving the tack, the inward movement ofthe tacker arm being limited by engagement of a portion of themechanism' carried thereby with a part of the side clamp mechanism 8.During the latter portion of the inward movement of the tacker arm thegrip.- per is tripped and caused to release the margin of the upper, andafter the acking mechanism has arrived at its limit of inward movement,the driver bar 18 is; re;

leased to the action of the spring arm 20 to cause the tack to bedriven. WVhile the driver 16 is held substantially at the end of itsdriving movement, the tacker arm 10 is swung outward to carry the tackholder clear of the tack and continuing its move ment is returned to itsstarting position, the driverbar 18 being then raised to withdraw thedriver from the tack pocket and leave the pocket in condition for thereception of another tack.

For the purposes of this invention each of the recesses or grooves 36 inthe adjacent sides of the tack holder fingers 14 is provided at itslower end with a tapering por tion 40 of considerable length, thesetapering portions coiiperating to provide a comparatively narrow taperedrecess for guiding the tack. Asthe tack is forced outward by .the actionof the driver 16, the shank of the tack is forced through this narrowrecess which serves as a guide to insure that the tack shall ,be driveninthe right direction, causing the two :fingers to separate -slightlyagainst the tension of the spring 34;, the two fingers being furtherseparated by the wedging actionof the head ,ofuthe tack and then of .theend of the driver 16 i on the walls of .the tapered recess near the endof the tack :dri-ving operation. Preferably theQtack .holder ispositioned in sufficiently close proximity to the work to per- ,mit asubstantial portion of the length of the tack to be forced into the workbefore' the driver becomes effective to spread the fingers 14. The tackis thus held in effective control asto the direction-of its drivingmovement during its passage between the tack holder and the work anduntil it has effected a substantial entrance into the work. As the headof the tack is forced downward through the tapered recess at the lowerend of the tack pocket the driver 16, which is preferably .ofslightlylarger diameter than the head of the tack, becomesefiective uponthe walls of therecess -to wedge the walls apart during the continueddriving movement of the tack. For the purposes of this invention, themovement of the driver 16 is limited by adjustment of the washer 2 1 toprevent the tack from being driven entirely through the sole a, and asshown in Fig. 5, which illustrates the positions of .the parts at theend of the movement of the driver, the'tack cl is left with its headportion still projecting within the tapered re-.

been withdrawn laterally away from the tack, as illustrated by Fig. 3,although it will be evident that in the construction 7 shown the driver,by its engagement with the walls of the tapered recess, will remaineifective to prevent any substantial displacing action upon the tackeven if the driver begins its return .movement before the tack holder isentirely clear of the tack. It will be evident that by the constructionherein provided any such pressure of the parts of the tack holder uponthe tack as would tendto displace the tack laterally is entirelyobviated, and that however lightly the tack may be anchored in the work,there is no danger of bending it or of withdrawing it from the workduring the retractive movement ofthe tacking mechanism.

While the term tack is used herein ,to designate the fastener which theillustrative mechanism is adapted to drive, it will be evident that theinvention is not limited in utility to mechanism for driving'fastenersor" the precise form shown, and it should therefore beunderstood thatthe term is used in a generic sense as applicable to various forms offasteners.

Having described the invention, what I claim as new and desire to secureby Letters Patent of the United States is:

1. In mechanism .i'or applying to shoes upper holding tacks-which are tobe subse quently pulled, the combination with means for determining theplai-Le of the tack receiving surface of the shoe, of a tack holderbetween which and the shoe there is provision for relative movementtoward and from tacking position transversely of the direction ofdriving movement of the tack, a tack driver, driver operating means andcontrolling means arranged to arrest the movement of said driver at sucha distance from said plane as to leave a portion of the driven tackprojecting outside oi the tack receiving surface of the shoe, saidholder being constructed and arranged to guide the tack beyond the limitof the movement of the driver and to be conditioned by the driver topresent a tree outlet passage for the head portion of the driven tackuntil the holder is clear of the tack in the relative movementof theshoe and the holder laterally of the tack. away from the tackingposition. 7

2. In mechanism for applying to shoes upper holding tacks which are tobe subequently pulled, the combination with means for determining theplane of the tack receiving surface of the shoe,,of a tack holderbetween which and the shoe there is provision for relative movementtoward and from tacking position transversely of the direction ofdriving movement of the tack, said holder comprising relativelyseparable portions constructed to position a tack between them ieldablemeans for relativel positioning saidportions oi the holder whilepermitting their relative separation in the tack driving operation, atack driver, driver operating means and controlling means arranged toarrest the movement of the driver at such a distance from said plane asto leave a portion of'the driven tack projecting outside of the tackreceiving surface of the shoe, the separable portions of said tackholder being constructed to guide the tack beyond the limit oi themovement of the driver and to be wedged apart and held by the driver insuch relation as to provide an outlet passage for the head portion ofthe driven tack of a width to prevent pressure on the sides of the headof the tack during the relative movement of the shoe and the holder toclear the. holder from the tack. V V

3. In mechanism 01 the class described, a

tack holder comprising relatively separable portions constructed toposition a tack between them, means for ellecting relative movement ofsaid holder and the work after the driving of a tack, and means fordriving a tack only partially out of said holder and into the work andfor eifecting and maintaining such relative separation of the por tionsof the holder as to provide an outlet passage for the tack of a width toprevent any substantial pressure of the holder on the tack until theholder is clear of the tack in the relative movement of the holder andthe work after the tack driving operation.

t In mechanism of the class described, a tack holder comprisingrelatively separable portions constructed to position a tack betweenthem, yield-able means for relatively positioning said portions or" theholder while permitting their relative separation in the tack drivingoperation, tack driving means, means for controlling said driving meansto cause a portion of the tack to be left upstanding, from the work andwithin the tack holder at the end of the driving operation, and meansfor moving the tack holder laterally of the tack to withdraw said holderfrom the tack, the tack driving means and the tack holder beingconstructed to cooperate for maintaining such relative sep aration ofthe portions of the holder as to provide an outlet passage for thedriven tack of a width greater than the diameter of the head of the tackto prevent displacement of the tack in the withdrawal of said holder. i

j 5. In mechanism of the class described, a tack holder comprisingrelatively separable portions having opposed recesses for holding atack, yieldable means for relatively forcing said portions of the holdertoward each other While permitting their relative sepa ration in thetackdriving operation, a tack driver, means for operating saiddriver,and means for effecting relative movement of the holder and the workafter the driving of a tack, said driver and operating means beingconstructed and arranged to force the tack only partially out of theholder and then to maintain the portions of the holder separated in suchmanner as'to provide an outlet passage for the tack of a width toprevent any displacing action oi the holder upon the tack until theholder is clear or" the tack in the relative movement of the holderandthe work. V

6. In mechanism'or" the classdescribed, a tack holder comprisingrelatively separable portions having opposed recesses for holding atack, yieldable means for relatively positioning said portions of theholder while permitting their relative separation in the tack drivingoperation, a tack driver, means for operating said driver, means forlimiting the movement of the driver to cause the head portion of thetack to remain between the tWo portions of the tack holder at the endof'the driving operation, and

means for effecting relative movement of the holder and the work afterthe driving or a tack, said driver and the walls of said recesses beingconstructed and arranged to cause the driver to effect such relativeseparation of the portions of the holder as to provide an outlet passagefor the tack of greater width than the diameter of'the head of the'tack'and-to maintain the portions of the holder thus separated to preventdisplacing action of the holder upon the tack until the holder is clearof the tack in the relative movementof the holder and the work after thetack driving operation.

'7. In mechanism of the class described, a tack holdercomprisingrelatively separable portions constructed to position a tackbetween them, a tack driver,-means for operating said driver, means "forlimiting the movement of the driver to cause the head portion of thetack to remain within the holder at the end of the driving operation,and means for effecting relative movement of the holder and the workafter the driving of a tack, said portions of the holder havingelongated tapering recesses opposed to each other for holding andguiding the tack, and the driver and the walls of said recesses beingconstructed and arranged to cause the driver to effect a relativeseparation 01" the two portions of the holder and to maintain saidportions in such separated relation as to provide an outlet passage forthe tack of a width to prevent any displacing action of the holder uponthe tack during the relative movement of the work and the holder toclear the holder from the tack.

8. In mechanism of the class described, a tack holder comprisingrelatively separable portions having opposed recesses with tapered wallsfor holding and guiding a tack, yieldable means for relatively forcingsaid portions of the holder toward each other while permitting theirrelative separation in the tack driving operation, a tack driver, meansfor operating said driver to force the tack into the work and to efiectby engagement with the walls of said recesses a relative separation ofthe portions of the holder, means for limiting the movement of thedriver to cause the head portion of the tack to remain within the tackholder at the end of the driving operation, and means for effectingrelative movement ofthe holder and the work after the driving of a tack,said driver being larger in cross section than the head of the tack andso controlled as to cause the driver at the end of its driving movementto separate the portions of the holder sufficiently to provide -av freeoutlet passage for the tack and to maintain such separation until theholder is clear of the tack in the relative movement of the holder andthe work after the tack driving operation.

9. In mechanism of: the class described, a

tack holder comprising relatively separable portions constructed toposition a tack be tween them, tack driving means, and means for movingthe tack holder laterally of the tack to withdraw it from the tackaft-er the driving operation, said driving means being so'construct'edand operated as to force the tack only partially out or the holder inthe.

drivin operation and to maintain the norm r u tions of the holderseparated SUFl-Qlfilltlj to provide an outlet passage for the tack oisuch wldth as to prevent any displacing action of the holder upon thetack during the withdrawing movement or the holder.

10. In mechanism of the class described, a tack holder comprisingrelatively separable portions having opposed recesses for holding atack, yieldable means for relatively forcing said portions of the holdertoward each other while permitting their relative separation in the tackdriving operation, a tack driver, means for operating said driver, meansfor limiting the movement of the driver to cause the head portion of thetack to remain between the two portions of the maintain such relativeseparation of the portions of the holder as to provide a free outletpassage for the tack until the holder is clear or" the tack. V

11. In mechanism of the class described, a tack holdercomprising'relatively separable portions having opposed recesses withtapered walls for holding and guiding a tack, yieldable means forrelatively forcing said portions of the holder toward each other whilepermitting their relative separation in the tack driving operation, atack driver, means for operating said driver to force the tack into thework and to effect by engagement with the walls of said recesses a relative separation of the portions of the holder, means for limiting themovement of the driver to cause the head portion of the tack to remainwithin the tack holder at the end of the driving operation, and meansfor moving the tack holder laterally of the tack to withdraw it from thetack after the driving operation and while the driver is substantiallyat the end of its driving movement, said driver beinglarger in crosssection than the head of the tack to cause the driver to maintain suchrelative separation of the portions of the holder as to provide a freeoutlet passage for the head of the tack until the holder is clear of thetack.

12. In mechanism for securing the upper of a turn shoe in pulled-overposition, the combination with shoe positioning means, of a tack holdermovable transversely of the edge of the shoe bottom into and out ofposition for the driving of a tack, said holder comprising relativelyseparable portions constructed to position a tack between them, a tackdriver, means for operating said driver, and means for limiting themovement of the driver to cause the tack to be driven only partlythrough the sole of the shoe with a portion of the tack left upstandingfrom the work and within the tack holder, said driver and holder beingconstructed and arranged to cause the'driver to maintain such relativeseparation of the portions of the holder as to provide an outlet passagefor the tack of a width to prevent any displacing action of the holderon the tack during the movement of the holder to clear the tack.

13. In tacking mechanism, the combination with work positioning means,of a tack holder comprising relatively separable parts for holding andguiding a tack, a tack driver, means for operating said driver to drivea tack only partially out of the holder and into the work, and means foreffecting relative movement between the work and said tack holder anddriver laterally of the tack to clear the tack from the holder when thedriver is substantially at the end of its driving movement, the parts ofsaid tack holder having walls with tapering inner faces elongatedlengthwise of the driver to be wedged. apart by the driver and formed tocooperate with the driver to provide a free outlet between the parts ofthe holder for the head of the tack in said relative movement to clearthe tack from the holder.

In testimony whereof I have signed my name to this. specification.

EDGAR E. ROWE.

